Composition of matter.



nnrrnn STATES PATENT OFFICE.

Specification of Letters Patent.

I Patented June 26, 1906.

Application filed November 15, 1905. Serial No. 287,520,

To alZ whom it may concern:

Be it known that I, HUGO FRIEDMANN,

- director of the Charlottenburger Farbwerke,

Aktiengesellschaft, a subjectof the German Emperor, and a resident ofCharlbttenburg, near. Berlin, 'Charlottenburger-Ufer 53 /54, Germany,have invented a certain new and useful Composition of Matter to be Usedas an Addition to Printing. Inks or Compounds; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

'My invention relates to a new and useful composition of matter to beused as an addition to printing inks or compounds, which ma afterward beconverted, as by 'nding an mixing, into such inks, the 0%?ect 0 samebeing the production of a varnish, aste, or addition adapted. to bemixed wit the usual ready-made typographic printing-inks or to thematerials of which they are to be composed, so as to enable suchordinary ink to be used in lithographic printing without repeatedmoistening and wiping.

It is true that inks for flat rintin have already been made that can euse without repeatedly damping and wiping the printingplate and,further, that an intermediate product containing a paste-like varnishand glycerin has been formed in the rocess of making these inks. Pastesso obtained, however, are not suitable without further treatmentimparting keeping properties, nor have they the property of beingmiscible with ordinary printing-ink at any time. A paste combining thesepro erties, however, is of value ,forthe reason t at largle printersprefer to buy dry colors, which t e grind along with suitablelinseed-oil varnis in their own mills to make ink. By experiment acompar'atively simple compositlon has been discovered for such a paste,fulfillin both conditions and capable of being adfed without trouble tothe ink itself or to the ground mixture of dry color and varnishaforesaid; Such a paste may be composed of one hundred to one hundredand sixtyparts of resin, particularly gum-dammar; twenty-five to eightyparts of mineral oil, preferably petroleum; two hundred and ninety tofour hundred and thirty parts of glycerin; one hundred and twenty to twohundred and sixty parts of varnish, particularly linseed-oil varnish. Inpreparing the composition the resin or other gum is dissolved in themineral oil. The varnish is then added. To the mixture glycerin is addedin small quantities while the mixture is continuously stirred. Theglycerin can also be added to the solution of the gum in mineral oil insmall quantities and the var nish then added thereto. The inks preparedwith this paste are also suitable for printing on rotary machines.

What I claim is- 1. The herein-described composition of matter to beused as an addition to printinginks, or'compounds which may afterward beconverted, as by grinding and mixing, into such inks, consisting ofresin, mineral oil, glycerin, and varnish.

. 2. The herein-described composition of undred and ninety to fourhundred and thirty parts of glycerin, and one hundred and twenty to twohundred and sixty parts of a varnish, such as linseed-oil varnish.

In testimon that I claim the foregoing as my invention have signed myname in presence of two subscribing witnesses.

HUGO FRIEDMANN.

Witnesses HENRY HASPER, WOLDEMAR HAUPT.

